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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Sam Buteau# | .5621 | 1890 | |
| 2 | Alfred Kennerly# | .4466 | 1890 | |
| 3 | Oliver Marbury# | .3598 | 1890 | |
| 4 | Dan Hutchins# | .3435 | 1890 | |
| 5 | Sam Weeks# | .3405 | 1890 | |
| 6 | Jack Lalonde# | .3226 | 1890 | |
| 7 | Abel Drescher# | .2824 | 1890 | |
| 8 | Hank Cronin# | .1649 | 1890 |
